Acceleration and deceleration control method for high speed machining of numerical control machine

Abstract

The invention discloses an acceleration and deceleration control method for high speed machining of a numerical control machine. The method comprises the following steps of: initializing acceleration and deceleration control parameters; calculating the total length of a current motion segment to be planned; if no feed rate override operation is performed on the current motion segment, judging whether to perform acceleration and deceleration control on the motion segment for the first time; if the acceleration and deceleration control is performed on the motion segment for the first time, calculating steps for the acceleration stage, the constant speed stage and the deceleration stage of the acceleration and deceleration control and related parameters of a cubic function by using the totallength of the current motion segment to be planned, the initial speed and the final speed of the acceleration and deceleration control and the interpolation period of a numerical control system, and setting the count for the interpolation period as 1; if the acceleration and deceleration control has the constant speed stage, calculating the speed before filtering and inputting the speed into a moving-average filter for filtering so as to obtain a planned speed value in the current interpolation period; and updating the count of the current interpolation period to serve as a count for the nextinterpolation period. The acceleration curve obtained by using the method has high curve smoothness, small impact on mechanical systems and high flexibility.

Description

technical field [0001] The invention relates to a speed planning method of a numerical control system, in particular to an acceleration and deceleration control method for high-speed machining of a numerical control machine tool. Background technique [0002] Acceleration and deceleration control is an important part of the trajectory planning of the CNC system and one of the key technologies in the development of the CNC system. The goal of CNC machine tool processing is to achieve high-speed, high-precision machining. On the one hand, it is required that the CNC machine tool respond quickly, and that each coordinate moving part can reach a given speed in a very short time, and can quickly and accurately stop at a high speed during high-speed operation. The predetermined position shortens the preparation time; on the other hand, the machining process is required to move smoothly without impact, out of step, overtravel or oscillation. Therefore, a special acceleration-decel...

AI Technical Summary

Problems solved by technology

Although this method can guarantee the acceleration continuity of trajectory planning, it is complex to implement and requires a large amount of calculation.

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